Caliper gauge



K. LAUER.

CALIPER GAUGE.

APPLICATWN FILED NOV. 6. 1920.

Patnoed Mar. 14, 1922.

Fig/l.

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KARL Lanna, or KARLSKOGA, swnnnn, assrenon TO FRIED. xnorr AKTIEN- en'snnnscnar'r, or nssEn-oN-rrrE-Rtmn, GE M CALIPER GAUGE.

Specification of Letters Ifatent. Patented VMa r,

Application filed November 6, 1920. Serial No. 422,377.

To (ZZZ whom-z't-mctyconcern: 7

Be it known that I, KARL LAUnR, residing at Karlsltoga, Sweden, a citizen of the German Republic, have invented a certain new and useful Improvement in Caliper Gauges,

of which the following-is a specification.

This invention relates to caliper gauges of the kind having a touch lever lodged by means of two knife edges adapted to engage suitable notches, and comprising two parts adjustable relatively to each other. More particularly, the subject matter of the invention relates to an especially simple and compact form of construction of caliper gauges of this kind.

One embodiment of the subject matter of the invention is shown by way of example in the accompanying drawing illustrating an external caliper gauge and in which' Fig. l is a longitudinal mid-section of the improved caliper gauge, with some parts broken away.

Fig. 2a sectional view on line 22 in Fig.

1, looking from the top, and I Fig. 3 a sectional view on line 33 in F i 1, looking from the left.

eferring to these drawings the one extremity of the semi-circular frame A supports a casing a This latter is provided with a cylindrical bore a cf, the central longitudinal axis of which coincides with the prolongation of the central longitudinal axis of a stationary bolt arranged at the opposite end, not shown, of the frame A. A gauging bolt B is displaceably arranged within the bore a a and projects with one of its ends beyond the casing (1 The displaceability of this gauging bolt Bin the outward direction is limited by a pair of stop surfaces a 6 The inward end of the gauging bolt B is provided wit-h a conical bore 6 into which a bolt C, havin a conical point 0 is adapted to project. Acting under the impulse of a spring D, the bar-shaped element E of the two-part touch lever E, E is supported by aid of a notch 6 on a knife point 0 of the bolt C. The other element E of said lever E, E is forked; the two prongs e t-hereof being bent at their ends and provided at their extremities each with a knife 6. By means of these two knives e, the element E is adapted to engage two notches a formed in a bow a rigidly fixed to the casing a The edges of the knives c and e and the baselines of-the notches e and a are in to the edge of the notch 6 and are adapted to be adjusted by means of a set screw G and a lock screw H. The element E in addition carries an index J adapted to move across a graduated scale a visible through a sight opening a.

During the gauging operation any movement effected by the gauging bolt B is transmitted by intervention of the bolt '0. upon the touch lever E, E, which is thereupon caused to rock about the edges of the knives e. The extent of the oscillation carried out by the lever E, E and which is indicated by the index J, depends, on the one hand, upon the degree of displacement the gauging bolt B has been subjectedto, and, on the other hand, upon the space existing between the edges of the knives e and the base-line of the notch e However, this particular space and therewith the accuracy of gauging of the caliper gauge may be most delicatellyI regulated by means of the screws G and Claims: 4 1. In a caliper gauge, a body, a gauge bolt displaceable therein, a two-part touch lever moved by said bolt and means for rotating the parts of said touchlever relatively to one another about an axis, at right angles to the axis of the gauge bolt. 2. In a caliper gauge, a body, a gauge bolt, a two-part touch lever, a connecting bolt disposed between said gauge bolt and touch lever and provided with a knife edge engaging a notch in one part of said touch lever,

' knife edges carried by the other part of said touch lever and engaging notches in a supporting member secured to the gauge body and means for rotatlng the parts of said touch lever relatively to one another about an axis parallel to said knife edges.

3. A gauge of the class described comprising a body,a scale, a gauge bolt displaceable within said body, a two part touch. lever provided with a pair of knife edges on one part and a notch on the other part thereof, a

connecting bolt disposed between said gauge bolt and touch lever and provided with a lmife edge engaging the notch in a touch lever part, a member supported by the gauge bod provided with notches for the reception of t e knife edges of the other touch lever part, an index carried by said touch lever and laying over said scale and means for rotatlng sald touch lever parts relatively to one another about an axis parallel to said knife edges. I 1 or 4, In a caliper gauge, a body, a gauge bolt, a two-part touch lever, a connecting bolt disposed between said gauge bolt and touch lever and rovided with a knife edge engaging a note in one part of said touch lever,

an axis parallel to said knife edges.

The foregoing specification signed at Sweden, this 11 day of October, 1920.

KARL LAUER.

Inpresence of- V G. SJAYBAN, P. A. HERNEUI- I 

